Power-driven apparatus



June 17, 1930. A. WENNERBERG 1,764,655

POWER DRIVEN APPARATUS Filed Nov. 26, 1926 I A 7/4 1 Q 1 I y ry fwheelomittedyv .v s l Referring now to the drawings in detail; 1n

amus fwnnnnnnnne, on; enraged, ILLINOIS;'AS SIGN O R. 1Y0" KXfIESlfJiIRN nnnc'rnrc p oo uzenny, mconrona'rnnor new YORK, v. Y A ooaeonArronor nnwyonx a V7 rowER-nnIvENArrhBATns 1 Application .fi1ed Noiiemberfi, 1926: "Serial N 150,871, '7 4 I [This invention-relates'ito power driven apparatus,iand more particularly to a fricvtionally driven power apparatus for operatingreciprocating mechanisms, suehas punch sfpressesg 5; r 7 The object ofthis invention is tolprovilde a friction. drive for powerdriven mechanisms --embodying \means a for readily varying the driving pressure to a predetermined and uni- -1 form amountcbetween, a driving memberand a driven member, andpfor expeditiously'engaging or disengaging the driving member with or from the driven member.

In caccorda'nce with the generalfeatures of i LG 'thisinvgntion asappliedto a punch pressor dieing machineythere is provided a 'pair of friction drive rollers carried upon the extremitie's ofa pairof pivotal levers and yield ably maintained in driving engagement with :the periphery of thefly wheelof theipress at apointbelow the axis thereof, the rollers be-V ingdriven by sprockets and chains operativel-y connected to a drive shaft forming a commona'xial support-for the levers. Thedriv 'ing pressurel of'both of the rollers upon the fly wheel is controlled through the medium of i "an adjustable spring operatively associated with the levers, other means being included 7 fonsimultaneouslyengaging or. disengaging 5 the rollersfrom the'fly wheel. 1

i Other-objects and advantages iof this inven-- .7 tion will more'fu'lly; appear from the accompanying-detaileddescription-taken in connection with the accompanying"drawings,i ini Fig; l' is a sidejview of a punch press ;or c dieing machine having a friction; drivefem bodying features of "this invention appliedthereto; f a it -1Fig.i2 is 'an enlarged fragmentary detail vie'w, partly {in section, of the drive shown in Figrl and' I "Fig." 8 is a plan view thereof with the which like referencenumerals designate sim- 112111 parts throughout the" several views, and

"i --par.ticu1ar1y to Fig; l, the numeralb indicates I a fly wheel fixed to acrank ,shaftj6 rotatably journaled upon a rpunch press frame 75 0p the top surface of the frame 7 and support fa cross head or ram 13 on'which a; depending blank material inserted therebetween. The punch press illustrated in the drawings ,andto which theimp'roved friction drive has been applied represents alarge or heavy duty aroundv the in t-he-press abovejthefioor'lS. a The improved frictiondrive embodying the features of this invention will? now be I de- 1 scribed. Adriving motor 22 carried upon the base 16 and'having a sprocket pinion 23 fix ed'to itsarmature shaft is eonnectedat'o a" c -Z,sprocket wheel 24 attachedtoa rotarysh'aft 25 by a chain'26r-The motor 22 is preferably :'adjustably' ,mounted upon thebase 16'in any wellknown manner'togprovide-adesired%tenp forming-such adjustment is, indicated-aatf29. '.-Yert'icallyf disposed journals fixed tothe 7 .base 16 supportt-he sha'ft'2'5 adjacent opposite j *ends thereof,-fthesprocketjwheel 24 and-acol fxlar, 31-attached toopposite ends of the shaft,

erat-ively connected tojthe crankshaft in a usualmanner'is a crjankarm 8pivotally connected at its lower end to a verticallyreciprocating cross head 9, the latter being secured to four rods 10 in turn reciprocally carried upon the frame 7, two ofthe rods being illustratedin the drawings, the other two being hidden. The rods 10" extend upwardly from punch Q1 41 is carried, "the punch cooperating during" the operation of the press in. awell .knownmanner with adie, 15 supportedupon the upper surfaceof-the frame to' form jor type, itsbase being mounted in a' pit 17 "formed below. the level of afioor 18, with the upper portion ofthetpress extending thereabove'to .bring the c'ooperatingpunch 14- and the die 15 Within convenientreach of an attending operator. The lower peripheral'surface of the flywheelb ispositioned withinthepitl? pwardly projecting portions ofsioni .-uponthefchain'26c One means'f'orpen and abutting outer faces of, the journals serve ,toiipreventlongitudinal"displacement of the I-along with a friction drive mechanismropera- I .tively' associated jztherewith and embodying J rthefifeatures of this invention, which will be. c Lpresentlydescribed,the opening inthe floor w resulting from the pit 17 being a covered by a metal fgrating 21, which extends closely shaft. A pair of pivotal levers 32 and 33 are mounted upon the shaft 25 intermediate its ends, the shaft forming a common axis therefor upon which the levers may turn independently of the rotation of the shaft. The outerend of each of the levers 32 and 33 is bifurcated and supports thereon-a relatively stationary shaft 36 which spans the arms formed uponthe lever. Freely mounted for rotationupon each-of the shafts 36 is a'friction roller 37 provided upon its peripheral face with a sleeve 38 composed of-cork or other suit-able friction material for engaging the periphery of the flywheel 5, the rollers being centeredwith respect to the face of the latter. Secured to each of the rollers 37 but at opposite ends thereof-as'indicated in Fig.

3 is'a sprocket wheel 39, each-sprocket wheel being operatively connected to a sprocket wheel 40 fixed'to the shaft 25at opposite ends thereofadjacent the inner faces of the journails 30, as vieWed'in Fig. 3, by a chain 43.

'It will be apparent that upon causing the shaft 25torotate, for instance, in a clockwise direction, thefriction rollers 37 through the hereinbefore 1 described arrangement and the cooperating sprocket wheels24, 39 and40 and their interconnecting hains 43 -will'also r0- 'tatein'the samedirection.

To maintain the friction rollers in engagement with the fly wheel 5with a predetermined uniform driving pressure, the following 'mechanism is provided. Referring particularly to Figs. 2 and 3,'the levers '32 and 33 upon their inner axial portions and at each end thereof are provided'with a pair of upwardly extending arms 44 and 45, respec- ,tively,-the arms 44 and-45 upon opposite corresponding ends of'the levers being directly opposite and; spaced from each other. Pivotally mounted upon the upper end of the .arm44, which is bifurcated,is a-screw thread ed eye bolt 46, the threaded end there'offree- 1y passing through anaperture provided in the arm 45. Surrounding-the projecting end 'of'the bolt '46is;a coiled com'presslon spring 47-with opposite ends thereof disposed between aface of the-arm45and a nut 50-threaded onto the bolt. It will be apparent that the levers"32 and"33are thus yieldabl y con- 'nectedtogetner andby uni'forml y adjusting the nuts: 50'a-ss'ociated with the bolts 46 the frietional'driving pressure of each of the rollers'38 upon theperiphery of the fly wheel 5' ma y be 1 regulated to a uniform and predetermined degree, the COIHP'IGS'SIOIL of the springs 47 normally maintaining the rollers in drivingengagement with the fly wheel. The means provided for'simultaneouslyen- A gaging or disengagingfthe-rollers37 with or from the flywheel 5will nowbe described.

Rotatably carried i'n bearings'51 formed upon the'jou'rnals 30 directly above the shaft 25 and'extending across the inner axial portions of the l'evers*32and 33 and'within-the space provided between the vertical arms 44 and 45 formed thereon is a cam shaft52. The opposite inner faces of each of the arms 44 and 45 between which the shaft 52 extends are provided with notches or depressions 53, thef;p'urpose of which will be presently described. Fixed to the shaft 52 at-each end 'thereofbetween each set of the oppositely hand wheel56 1) is'rotatably journaled upon the press frame 7 above the floor 18 and is operativcly connected to the shaft 52 by a plurality of sprocket wheels-57 and chains 58 whereby an operator may conveniently rotate-the cam members 54, 90 from their normal position as shown in-their operative position in which :they will engage the opposite surfaces of the arms'44 and45 within the depressions 53 thereof. Thelatter position of the cam members 54 will cause the levers 32 and 33 to be rockedzcoiinter-clockwise and clockwise, respectively, upon the shaft 25 and thus disengage the 'rollers 37 simultaneously from the fly wheel 5. Upon a reverse movement of the hand wheel 56 the rollers 37 will again engagethe fly wheel 5. It will be apparent, that the disengagement or engagementof the rollers 37 with the fly wheel 5 maybe effeetedwithout disturbing thetransmissionxof-power from the motor 22to the rollers'37 orthe normal driving "pressure between :the rollers and the fly the fly wheel slowlyby, hand.

7 It is believed that the operation of the V friction drive embodying the features ofthis invention will be clearly evident from the foregoing detailed description thereof without a-general description of its operation.

' What is :claimed'is 7 1. In a power driven apparatus, a fly wheel,

a pair: of friction drive Inembers ithere'for,

levers independently supporting the drive members and having opposing: surfaces, ad'- justable means ifoncmaintaining the drive members in driving engagement wlth the'fly wheel, and means operatively disposed between the opposing surfaces of thel'evers' and adapted to simultaneously disengage the drive "members from the fly wheel without disturb- .ing'the normal-adjustment of the adjustable means. n a r 2.In a power driven apparatus, a fly wheel, a pair'of friction drive members therefor, levers for independently supporting the drive members having a common fixed pivot and having angularly disposed arms, an adjustably mounted spring interconnecting the angularly disposed arms of the levers for maintaining a uniform predetermined driv- 1 ing pressure between the members and the fly wheel, and means movable into association with the levers for rendering the spring 1noperative.

3. In a power drlven apparatus, a dI'lVGl'l' element, a plurality of friction drive members therefor, a plurality of pivoted members supporting the drive members, and means operatively associated with the pivoted members for simultaneously disengaging the'drive members from the driven element and disassociated from the pivoted members when the drive members are in driving engagement with the driven element.-

, 4:. In a power driven apparatus, a fly wheel of apunch press, a pair of drive rollers nor-- is mally engaging the periphery of the fly wheel,- a pair of levers having a common pivot and supporting said rollers, angularly disposed arms fixed to said levers, resilient means urging the arms together to thereby cause the rollers to bear against the periphery of the flywheel, and cam means for forcing said" arms apart to disengage the rollers from the fly wheel. 7 r

5. In a power driven apparatus, a flywheel,

a pair of driven rollers normally engaging the periphery of the fly wheel, a 'pair of levers supporting said rollers, angularly disposed arms fixed to said levers and having cam faces disposed adjacent eachother, yielding means urging said arms together to thereby cause the rollers to bear on the periphery of the fly wheel, and a cam member adapted v to co-act with said cam faces to force said arms apart and thereby disengage the rollers from the fly wheel.

' 6. In a power driven apparatus, adriven member, a plurality of friction drive members therefor, a plurality of pivoted members supporting the drive members, a plurality of s arms fixed to said pivoted members and hav ing facesdisposed adjacent each other, yieldi ing means urging said arms together to thereby cause the drive members to bear against,

the driven member, and cam means adapted to cooperate with said faces to disengage the drive members from the driven member.

Inv witness whereof, I hereunto subscribe my name this 12 day of November, A. ll,

' AUGUSTEWENNERBER 

